CRM Email Issues

Hi,

I have configured Email router for MS CRM 2011, And in the "Load user" step the users wr also successfuly loaded.

Now When I m trying to send a mail from that user,The mails are in pending send Status.

User setting is correct, I have checked the option to send emails on his behlf,And the Email address is also approved.

I am not getting why that mails are not coming ?

I have selected Local System account while configuring Email Router.

Any thing else to Check ?

Please Help !!

Thanks